HI-SINCERITY

MICROELECTRONICS CORP.

Spec. No. : Preliminary Data

Issued Date : 1998.08.01

Revised Date : 1999.06.01

Page No. : 2/4

HSMC Product Specification

Pin Connections

Pin1 : Vcc

Pin5 : Gnd

Pin2 : RSL Trigger In

Pin6 : High Freq. Time Constant.

Pin3 : Low Freq. Time Constant.

Pin7 : High Freq. Time Constant.

12

3

4

5

6

7

8

Pin4 : Low Freq. Time Constant.

Pin8 : Output

Electrical Characteristics

Characteristics

Symbol

Test Condition

Min. Typ. Max. Unit

Operating Voltage

--

29

V

Initiation Supply Voltage

(Note 1)

17

19

21

V

Sustaining Supply Voltage

(Note 2)

10.5

12

-

V

Initiation Current Consumption

No Load

1.4

3.3

4.2

mA

Sustaining Current Consumption

0.4

1.4

2.0

mA

C1=0.47uF, R1=165k

Ω

910

11

461

512

563

Oscillator Frequency

C1=6800pF, R2=191k

Ω

576

640

703

Hz

"H" Level

Pin 7=Gnd

20

21.5 22.5

V

Output Voltage

"L" Level

Pin 7=7V

0.7

1.0

2.0

V

Note 1 : Initiation Supply Voltage (Vsi) is a supply voltage required to start oscillation of the tone ringer.

Note 2 : Sustaining Supply Voltage (Vsus) is a supply voltage required to maintain oscillation of the tone ringer .

Note 3 : Oscillation frequency is determined by the following equations (1), (2) and (3) :

(1)fL=1/1.234, R1, C1 (Hz) (2) fH1=1/1.515, R2, C2 (Hz) (3) fH2=1.24 fH1 (Hz)

Method Of Using Rsl

In the H31002P, using the RSL terminal can change the initiation supply current (Isi). The

resistor RSL is connected to Gnd from Pin 2 as shown in Fig.3.

Further, the initiation supply current (Isi) can be changing the value of RSL. Fig.4 shows the

graph of Vs-Is characteristic at the time when RSL has been changed to three values. The Vs-Is

characteristic at the time when RSL=6.8 k

Ω coincides with that at the time when Pin 2 of the

H31002P has been used at an open state. If Pin 7 is connected to Gnd as shown in Fig. 5, the

H31002P can stop oscillation. (the “L” level voltage is under 2V)

Cur r ent Consupmpt i on( mA)

1. RSL=1. 3K 2. RSL=3. 3K 3. RSL=6. 8K

|

|

|

|

|

|

1

3

|

|

|

|

|

|

Vs us

Vs i

0

1

2

3

4

5

6

7

8

0

102030

Suppl y Vol t age ( v )

2

Fig.4

Fig.5

Internal IC

Pin 7

HF1

Fig.3

H31002P

1

2

5

RSL

Gnd

Vs